Product Overview: MAX690TEPA+ from Maxim Integrated

The MAX690TEPA+ is a highly reliable microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in µP and digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in battery-powered applications. This supervisory circuit ensures that the µP is reset to a known state during power failures, thereby safeguarding system integrity.

The MAX690TEPA+ features a combination of functions such as reset output during power-up, power-down, and brownout conditions. It also includes a 1.3V threshold detector for power-fail warning, low-battery detection, or to monitor a power supply other than +5V. The device's reset threshold is factory-trimmed to 4.65V, ensuring a precise monitoring of the +5V power supply.

Additionally, the MAX690TEPA+ offers a minimum power-on reset pulse width of 100ms, which provides ample time for the µP to stabilize during power-up. The reset output is guaranteed to remain in the logic low state with VCC as low as 1V, enhancing the reliability of the system during low-voltage conditions.

The device is available in an 8-pin PDIP package, making it convenient for use in systems with limited space. It operates over a wide temperature range of -40°C to +85°C, suitable for various industrial applications. The MAX690TEPA+ also features a low supply current of 40µA, which is beneficial for power-sensitive designs.

With its watchdog timer, the MAX690TEPA+ can help prevent system failures by resetting the µP if it fails to strobe within a preset time frame, ensuring the system remains functional even in the event of software anomalies.

In summary, the MAX690TEPA+ from Maxim Integrated is a versatile, reliable, and cost-effective solution for power monitoring and µP supervision. Its integration of multiple functions, precision voltage monitoring, and low power consumption makes it an excellent choice for a wide range of applications, including portable devices, computers, controllers, and intelligent instruments.